Answer:
 5.03 L 
Explanation:
we know that 1 inch = 2.54 centimeters 
 (1 inch)3 = (2.54 cm)3 
 1 in3 = 16.387 cm3 
 
therefore 
volume in cm^3 = (volume in in3) x (16.387 cm3/1 in3) 
 
volume in cm3 = (307x 16.387) cm^3 
 
volume in cm3 = 5030.809cm^3 
 
let us convert to liters. 
we know that 
1 L = 1,000 cm3 
 
volume in L = (volume in cm3) x (1 L/1,000 cm3) 
 
volume in L = (5030.809/1,000) L 
 
volume in L = 5.03 L 
 307 cubic inche engine displaces 5.03 L