AQ late in the tourney

[ejay]

This is from a starts 180 s&g. At the time this hand takes place there are 23 players left and 18 get paid. I have 5765 which is below avg. at this time. The blinds are 200-400 and 25 ante.

Preflop: utg player raises to 1600. He has a lot of chips and has been aggressive. Player in mid pos. calls 1600 (and has 1400 left). I am on the button with AQo.

The way that i looked at it was that the utg player didnt need a strong hand to raise. He wanted to pick up the antes and he has been opening like 3 times a round for the last few orbits. The player that flat called confused me because i didnt really know why he was saving 1400. I felt that by raising i can get the utg to fold and be heads up with the mid position player. I decided to push with my AQ.

I am fairly new to tournaments and i think i may have overplayed my hand. What are your suggestions in situations like this?