Villain is Jenn415, seems solid and quite tight and plays higher stakes up to 5knl

We played a bit yesterday, and after my preflop btn raise, I c/c three streets with an overpair and he showed an unimproved gutshot...

This is such a standard shove for him though, but yet I don't know how profitable it is to call here w/out any real reads.

Full Tilt Poker - No Limit Hold'em Cash Game - $5/$10 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $1,220.00
BB: $1,047.00
Hero (UTG): $1,252.00
CO: $1,417.25
BTN: $985.00

Preflop: Hero is dealt J K (5 Players)
[color:red]Hero raises to $35.00[/color], CO folds, BTN calls $35.00, 2 folds

Flop: ($85) J 7 9 (2 Players)
[color:red]Hero bets $60.00[/color], BTN calls $60.00

Turn: ($205) 6 (2 Players)
[color:red]Hero bets $125.00[/color], BTN calls $125.00

River: ($455) 5 (2 Players)
Hero checks, [color:red]BTN bets all-in for $765.00[/color], Hero folds
Uncalled bet of $765.00 returned to BTN

Pot Size: $455.00 ($3 Rake)