Cube gathered for a meeting

I had a red cube like this I took 26 more such cube(red from all sides) and joined them to form a bigger cube $(3\times3\times3=27) red cubes$ . And painted it blue from all of its six sides from the outside, like this. Now , I took 26 more such cubes (with each cube having ( $3\times3\times3$ ) red cubes painted blue from outside), and joined them to form a much bigger cube $(9\times9\times9=729 cubes)$ and painted it Green from all its six sides from the outside like this:

How many smaller cubes $the$ $one$ $that$ $I$ $had$ $at$ $the$ $starting$ are painted green on 1 side and red on the other 5 sides?

This is third problem of the set Just Imagine