50NL~ TPTK in 3b pot

vil is 29/19, 54% afq, 75% fold to 3b, 2% flop raise over 150 hands. Last time I 3b him he called oop w/ATo


SB: $49.50
BB: $91.51
UTG: $55.50
MP: $68.97
Hero (CO): $70.90
BTN: $55.73

Pre Flop: ($0.75) Hero is CO with A K
1 fold, MP raises to $1.75, Hero raises to $6.00, 3 folds, MP calls $4.25

Flop: ($12.75) A 7 6 (2 players)
MP checks, Hero bets $8.00, MP raises to $20.00, Hero ???


I have no idea what he's doing this with. He's repping such a narrow range here but A7/A6 seem a little out of his flatting range and so do 77/66... TP with a flush draw? Do I flat and keep all his possible bluffs/semibluffs in or make a tight fold? Can't decide which option I hate more

I'd just jam and be fairly happy about it.

I can go either way, as long as none of my options involve folding this hand.

Jam, or call if you think he'd possibly bluff shove turn ever. Calling any turn. Jam if you think he'd call a hand like AT pre AND c/r flop (which I don't think most ppl would do)

make it 37$ total?