About 8mL; the volume will vary slightly according to temperature.
Explanation:
The density of water, rho, H_2O=1.00g*mL^-1 at standard temperature. If we divide mass by density we get a result in volume: (mass)/(density), i.e. m/rho=(8.00*cancelg)/(1.00*cancelg*mL^-1)=8.00*(1/(mL))^-1=8.0*mL.