A certain loudspeaker has a diameter of 44 cm. At what frequency will the wavelength of the sound it emits in air be equal to its diameter? Figure out the answer in Hz, but do not enter units. (Note: If the wavelength is large compared to the diameter of the speaker, then the sound waves spread out almost uniformly in all directions from the speaker; but when the wavelength is small compared to the diameter of the speaker, the wave energy is propagated mostly in the forward direction.)