Villain is a unknown after 6 hands. Snap call, cry call or fold? Also, does anyone check back the turn?

It feels like a snap call with 50% equity vs {nuts+AJ}


Poker Stars, $0.10/$0.25 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

Hero (BTN): $35.77 (143.1 bb)
SB: $21.50 (86 bb)
BB: $26.67 (106.7 bb)
UTG: $26.17 (104.7 bb)
MP: $43.99 (176 bb)
CO: $7 (28 bb)

Preflop: Hero is BTN with A Q
3 folds, Hero raises to $0.62, SB folds, BB raises to $2, Hero calls $1.38

Flop: ($4.10) J Q 9 (2 players)
BB bets $2.75, Hero calls $2.75

Turn: ($9.60) A (2 players)
BB checks, Hero bets $5, BB raises to $21.92 and is all-in, Hero calls $16.92?