What is the worlds largest pyramid in volume and where is it?

Cholula in Puebla, Mexico seems to be the current champ at 4.45 million cubic meters

While there is still a debate about the actual volume of La Danta in the Mirador Basin of northern Guatemala, a figure of 2.8 million cubic meters seems to be currently accepted.

The Great Pyramid of Giza is still the tallest but smaller by volume with 2.5-2.6 million cubic meters.