3/6: 76s flops second pair on the button.

[TripleH68]

PokerStars 3/6 Hold'em (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB is my nemesis at this table. A little loose preflop, average postflop but he has been getting lucky tonight.
Loves to wait until the turn to raise.

UTG+1 is 24/13/1.85. I realize suited aces are likely in his range this hand,
but he could easily be making a play with a number of different holdings.

CO is average/weak.

Preflop: Hero is Button with 6[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">3 folds</font>, CO calls, Hero calls, <font color="#666666">1 fold</font>, BB checks.

Flop: (4.33 SB) 7[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, UTG+1 checks, CO checks, <font color="#CC3333">Hero bets</font>, BB calls, <font color="#CC3333">UTG+1 raises</font>, CO folds, <font color="#CC3333">Hero 3-bets</font>...

What's my play from here?
Suggest an alternate line?