Lock Poker - $2 Bounty - 20/100/200 Blinds - 8 Players

First hand on whole new table, so I don't have reads on CO villain. UTG villain is passive, tends to limp/fold to raises or to c/f OTF. No SB this hand FYI.

UTG - 7,660
UTG+1 - 5,565
MP1 - 4,018
MP2 - 13,282
HJ - 3,470
CO - 10,864
BTN - 2,065
BB (Hero) - 4,242

Pot is 360

Dealt to agnesamurphy T,9

UTG calls 200, 4 folds, CO calls 200, BTN folds, Hero checks

Pot is 760

*** FLOP *** 7, A, T

Hero checks, UTG checks, CO bets 760, Hero???

I'm not worried about UTG, but I don't love my 2nd pair to this pot-sized bet, and it's unlikely I'll love it OTT. Considering the pre-flop action, CO villain doesn't necessarily have Ax here, and could easily be betting because he's in position and has a big stack and could afford it if someone called and had to fold OTT. Also, I would totally make this bet if I were the one in position and were bluffing, so that factored into my thinking here.

However, there isn't a lot I want to see OTT. I also have never played with this villain before, so I'm not sure if he would limp IP w/ an ace. I'm having trouble deciphering how much of his range I'm beating here. Should I call, raise, or fold?