Answer:
well lets double check
5 x 6 x 12 = 360 doubled would be 720
now lets double the dimensions
5 x 2 = 10, 6 x 2 = 12 12 x 2 = 24
10 x 12 x 24 = 2880
The answer is no, if you double the dimensions it doesn't mean your actual volume is doubled from the regular dimensions.