A top is formed by fusing two identical right circular cones by their bases as shown at left. The height of the top, hhh, which is the distance between the two cone points, is 666 centimeters \text{(cm)}(cm)start text, left parenthesis, c, m, right parenthesis, end text. The diameter of the circular cone bases, ddd, is also 6\,\text{cm}6cm6, start text, c, m, end text. What is the volume of the entire object, in cubic centimeters?

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