The Lagoon Nebula (the figure (Figure 1)) is a cloud of hydrogen gas located 3900 light-years from the earth. The cloud is about 45 light-years in diameter and glows because of its high temperature of 7500 K. (The gas is raised to this temperature by the stars that lie within the nebula.) The cloud is also very thin; there are only 80 molecules per cubic centimeter.

Find the gas pressure (in atmospheres) in the Lagoon Nebula.
Express your answer using two significant figures.