Trips on river vs maniac, push or call?

[Spaded]

The villain is literally 90/65/1.1 after 71 hands. He thinks he is Gus Hansen.

$0.25/$0.50 - No Limit Hold'em
Seat 1: x ($41.75)
Seat 2: x ($8.25), is sitting out
Seat 3: x ($53.55)
Seat 4: Villain ($80.60)
Seat 5: Hero ($49.50)
Seat 6: x ($69.35)
Hero posts SB $0.25
x posts BB $0.50

*** HOLE CARDS ***
Dealt to Hero [Qd Ac]
2x folds, Villain raises to $1.75, Hero calls $1.50, x folds

*** FLOP *** [7c Kh As]
Hero checks, Villain checks I wanted to checkraise him, but it didn't work out.

*** TURN *** [7c Kh As] [3s]
Hero bets $2.50, Villain calls $2.50

*** RIVER *** [7c Kh As 3s] [Ah]
Hero bets $4.50, Villain raises to $22.50, Hero ??