In a certain solar house, energy from the Sun is stored in barrels filled with water. In a particular winter stretch of five cloudy days, 1.00 x 106 kcal is needed to maintain the inside of the house at 22.0oC. Assuming that the water in the barrels is at 50.0oC and that the water has a density of 1.00 x 103 kg/m3, what volume of water is required?