Length, width and thickness of a plate are 400 mm, 400 mm, and 30 mm, respectively. For the material of the plate, Young’s modulus of elasticity is 70 GPa, the Yield stress is 80 MPa and Poisson’s ratio is 0.33. When the plate is subjected to longitudinal tensile stress of 70 MPa, the increase in the volume (in mm3) of the plate is _______.