If I can be blunt… this is an absurdly easy call. I don’t say that to make you feel bad about posting, just to drive the point home: as you say, it’s quite unlikely you have a hand stronger than AA, which gives your opponent incentive both to bluff and to play worse hands for value. Though you aren’t a lock to win, you are a heavy favorite and should be quite excited to get your money in here. Poker isn’t about certainty, it’s about understanding incentives (both yours and your opponents’) and making the best decisions you can given the inherent uncertainty. I suggest watching my “Getting Off on the Right Foot” series here on TPE.

Oh and I don’t mind your 3-bet size, but you should be aware that when you offer your opponent a decent price, you expand his range for seeing the flop, which is all the more reason you should be excited to get your money in here.