3 barrel FTW?

[Choparno]

Villain is 29/22 over a limited sample, no real line on his play other than that.

Is firing a 3rd barrel of say $275 profitable here, or does it get looked up light since I probably either have a set or air to bet like this? I just feel like nobody ever folds anything, but villain shouldn't ever have better than 1 pair here, right?

Texas Hold'em NL $3/$6, 6 players

CO: $132.30
BTN: $631.50
SB: $444.80
BB: $214.40
UTG: $591
Hero (MP): $998.25

Pre-Flop: Hero is dealt A[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/spade.gif[/img]
1 fold, Hero raises to $21, 1 fold, BTN calls $21, 2 folds

Flop: ($51) 5[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/club.gif[/img]
Hero bets $40, BTN calls $40

Turn: ($131) T[img]/images/graemlins/heart.gif[/img]
Hero bets $105, BTN calls $105

River: ($341) 6[img]/images/graemlins/heart.gif[/img]
Hero bets $275? Gives up?