That's a nice silhouette!

You're running into the same problem that anyone runs into when photographing a very backlit subject: a lot of light is coming from the background and creating a drastic difference in ideal exposure between the background and foreground.

Given this, you can handle the situation a number of different ways:

Change the Exposure to Equalize - This is the most ideal in a pinch, but least ideal overall. In your example, you would open up ~2 stops to get the sky on the edge of blowing out. This will create a very underexposed person - but it's better than nothing. You'll need to do quite a bit of post pro work with the RAW file, potentially even exporting a file made ideal for the background and a file made ideal for the subject - and then mask them together. Because the subject will be very underexposed - you can count on a good deal of noise to deal with as well.

Take Two Shots - If you can, take a shot with proper exposure for the background and one for the subject and then merge them together in your post-pro editor of choice. The benefit here is that you will have two great files to start with - so how exactly they map together is really up to you - and overall image quality can remain quite good. Auto-Exposure Bracketing and multi-shot can be used together to string the shots back to back.

Get a Reflector - Shine some light back on your subject! A single reflector can do wonders and it might just be all you need.

Add some flash - On camera flash is nobody's favorite - so if you can, move the flash off camera and into a better location for your lighting.

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On exposure compensation...Backlit subjects are some of the hardest for the meter to get right. In these cases, I'd highly recommend shooting in manual so that you can meter the background, meter the foreground, and then use your judgement to pick the best exposure for whichever method you intend to use from the above.