Alternatively, turn on bracketing and shoot up to 3 shots and merge them in post.
Not trying to discourage anyone from using this feature, but...
Your computer has a far more powerful processor than your camera. If you really want to do HDR, the software is about a hundred bucks (for the full version). Compared to the rest of your gear, that's a drop in the bucket. You gain the ability to completely manipulate the image how you see fit, and on a much bigger screen.
Just my 2 cents.