The lengths of the sides of a right triangle are 3, 4, and 5 centimeters. Rotate around the straight line where the hypotenuse is located to form a three-dimensional figure. Try to find the volume of the three-dimensional figure.
直角三角形的三边长是3、4、5厘米，以斜边所在直线为轴旋转，形成一立体图形，试求该立体图形的体积．
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