Live 40/80 flop middle pair with a backdoor flush

[UprightCreature]

I haven't played with the villian too much, but he plays a few too many hands and decently aggresive for a live game. I'm running bad and I think I have a weak-tight image at the table. On to the hand:

I'm in the hijack with A [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/spade.gif[/img].
Folded to me and I bump it. Folds to the villian in the SB who calls. BB folds and its heads-up.

Flop T 7 3 rainbow and the T is a [img]/images/graemlins/spade.gif[/img].

I get checkraised and I...? Whats my action and whats my plan for the turn?